the ordinary

The Ordinary Lactic Acid 5% + HA 2%

The Ordinary Authentic
✔︎ In Stock. We ship today if you order before 1 pm

The Ordinary Lactic Acid 5% + HA 2% by The Ordinary


Lactic Acid is an alpha hydroxyl acid that exfoliates the skin. The Ordinary Lactic Acid 5% + HA 2% offers very mild exfoliation and is supported with a purified Tasmanian pepperberry known to reduce signs of inflammation and sensitivity that is often associated with exfoliation.

This formula contains a studied Tasmanian Pepperberry derivative to help reduce irritation associated with acid use. This derivative is of plant origin and varies in colour seasonally and this colour variation may be apparent in the formula from time to time.

When to not use The Ordinary Lactic Acid 5% + HA 2%: Lactic Acid should not be used on sensitive, peeling or compromised skin. Please refer to additional sun protection note and other warnings in provided Directions.


This pH of this formula is approximately 3.8. Lactic Acid has a pKa of 3.8 and pKa is the most important aspect to consider in formulating with acids. pKa implies acid availability.  When pKa is close to pH, there is an ideal balance between salt and acidity, maximizing effectiveness of the acid and reducing irritation.  Higher pH numbers in such a case would increase salt which counter-intuitively would make the formula even more irritating than if the formula was more acidic.

We suggest this product be used within 12 months after opening.

Shipping & Returns
Reviews (27)
Write a review
Great chemical exfolaition for beginners - 20-06-2018 by

this was the first ever chemical exfoliation I used and I saw an improvement overnight!! It made my skin glowy and more bright after just a few uses and faded my hyper-pigmentation over time.

After finishing this bottle I purchased the 10% lactic acid and am also loving that one!!

Amazing for new acid users - 16-06-2018 by

I've never used acid before but it makes a huge difference to helping with dry skin! I use it every night and its improved the overall texture of my skin. I think if you have used acids before it may not be right for you and would be better off with a stronger one but for first time users this is great as it doesn't cause a reaction but still works well.

A gentle exfoliant that packs a punch! - 14-06-2018 by

This is one of my favourite go-to chemical exfoliants. It is light weight, and can be used each night to help break away any surface oil, dead skin and other things that can lead to blemishes and uneven skin tone.

Regular use of this product visibly leaves the skin feeling smooth and clear as well as bright and revitalised.

I like to use this product in conjunction with the Salicylic Acid 2% to help skin remain bright, youthful and blemish free!

Amazing! - 13-06-2018 by

I bought this after watching a youtube video and the girl had amazing skin. I didn't really know I needed this until I used it! I have combination skin and this lactic acid is such a gentle exfoliant and makes my skin so much brighter and clearer. Would highly recommend!

Very mild exfoliating serum - 12-06-2018 by

Having tried both the 5% and 10% versions of this serum, I much prefer the stronger one. If you have incredibly sensitive skin or rosacea, perhaps the milder one would be nicer, but I honestly don't think it had much effect. The 10% version is a really nice hydrating resurfacing serum. I use it once or twice a week at bedtime, applied to freshly cleansed skin, and wake up with soft, incredibly smooth, hydrated skin. It seems to help manage my cystic acne, and makes my skin lovely and silky.

Mild gentle AHA - 12-06-2018 by

This was my first introduction into AHAs so started off with the 5%. I was very wary of applying any acid onto my skin not knowing how my skin would react to it. This lactic acid is very gentle, even for newbies. I did not experience any tingling that was often reported and felt it was very mild. I did not see any difference from using this product, though it may be because I did not consistently use it. Next time, I'd probably try the 10%.

A great product - 12-06-2018 by

I have added this into my skincare routine. I have cystic acne and I am starting to see results

Great for rehydrating and resurfacing my dry skin! - 04-06-2018 by

This AHA has worked wonders with helping resurface and repair my skin especially in the winter months which makes it more prone to drying it out. The serum is amazingly hydrating for my skin and works well as part of my night time routine which has me using this on alternate nights to the ordinary retinol serum. With regular use my skin feels noticeably smoother and looks brighter. For the price of other comparable AHA products I do think this one is outstanding!
I did experience some slight stinging with the first few initial uses however this has subsided and resolved relatively quickly with no side effects.

Love The ordinary products but will try 10% solution next time - 23-05-2018 by

I really like how the ordinary is changing the market by bringing in good quality products for very affordable prices. I decided to try a chemical peel but have notice no difference with the 5% lactic acid solution using it every night.
I had been using one of their retinols and loving it as it was shrinking my pores and wanted to try swapping to lactic acid as I'm trying to get pregnant...
Will try the 10% lactic acid solution next time!!

INCREDIBLE - 21-05-2018 by

I use this every other day. Once it's soaked in my skin feels so much smoother. This is one of my faves and I get excited to use it! I have normal/combo skin and in the mornings my skin is so nice. Highly recommend.

Great for enlarged pores - 08-05-2018 by

If you can ignore the weird smell, this product is great. Has delivered results for my combo skin with oily T zone - my enlarged pores are definitely improved following use of this. I use a couple of times a week, at night, cycled with the Alpha Lipoic acid and retinoid.

First time acid user and love it! - 11-04-2018 by

This was the first acid I had tried and the verdict is in and I love it!

I use this every second day at night time as part of my skin car routine. It provides a gentle exfoliate which you can start to see results within minuets after using. I've been using the product for about 2 months now and no reaction - i cant wait to try the 10% in the future.

Great for those new to acids - 13-03-2018 by

A gentle exfoliant that will help anyone who is new to the world of facial acids.
Worked well with my combination skin and did not leave any reactions.

Gentle exfoliant - 27-02-2018 by

Nice, gentle exfoliant. You can see and feel the difference in like 3 minutes. Highly recommend.

Great acid to start with - 28-01-2018 by

Great product, have been using this over the past few months along with the Niacinamide 10% and the two products have cleared my acne and refined the texture of my skin.

I never experienced any stinging (granted, my skin isn't very sensitive) and it sank in quickly leaving no residue.

I won't repurchase as I'm stepping up to a stronger acid but definitely recommend this product to people who are starting to experiment with acids or anyone with sensitive skin as it is such a gentle formulation.

smooth skin after use - 11-01-2018 by

Good product, would recommend. I noticed my skin feeling smoother immediately after use.

Great for clearing acne - 19-12-2017 by

I love this. Along with the Glycolic Toner and Niacinamide from The Ordinary it has changed my skin. Using these in combination with using oils (marula, rosehip, almond and jojoba), gentle cleansers and nothing stripping, I have all but eliminated my adult acne. I think this is the real star though, helping clear blackheads and eliminate acne before it begins.
This smells a little funky, and is tacky feeling. I use at night only, and only twice a week.
Highly reccommend to those trying to clear their skin.

Affordable and effective. - 04-12-2017 by

I've been really enjoying using this product once a week. I feel like my skin is getting clearer. I've been using it at night and waking up in the morning with glowing skin. I like that it is not too harsh and that I am seeing results when I use this product.

Gentle exfoliation - 29-11-2017 by

I love The Ordinary's products and this does not disappoint. I have combination/sensitive skin and this works amazingly to control oil and shine without being too harsh. I use it only twice a week so this bottle will go a long way. Great price too.

Makes skin clearer and softer! - 13-11-2017 by

For the price, this stuff is amazing. I apply it with a cotton pad twice a week so I don't apply too much and dry out my skin. I use it alternating with a physical exfoliator and my skin is clearer and brighter. Definitely worth the price!

Super soft skin - 23-10-2017 by

I made the switch from physical exfoliators to this serum a couple of months ago and I'm never looking back. I have (very) dry skin and the flakiness of it can get out of control. Maybe it renews too quickly... I'm not sure, but I used to feel like I needed to exfoliate all the time and although it would give temporary relief, it just made my skin even drier. Now I use this stuff about twice a week and it's all I need. Especially the first morning after, my skin is so smooth! Despite my dry facial skin, I do get a greasy back (and bacne... Eewl!) and this really helps with that as well. So I feel like it would be good for all skin types. This doesn't irritate my skin and doesn't sting at all. It's just an allround winner. Highly recommend!

A must! - 24-08-2017 by

Put this on at night and you will wake up with clear, smooth and glowy skin. I have oily combo skin and this has controlled the oil slick. Loveeee

So gentle - 08-08-2017 by

I love this product, I find it super convenient! I struggle to use scrubs as I find them quite uncomfortable and harsh for my skin. This can be applied straight after cleansing on dry skin and that's it! I also have found it has helped control any congestion and breakouts.

Excellent Result - 02-08-2017 by

I am new to this product. I used to apply this everyday. This doesn't dry out my skin. My skin feels smooth now. Highly recommended.

Effective, affordable product - 16-06-2017 by

I have enjoyed this product so far. I have used pretty much every evening for the last two weeks and haven't had any irritation or issues.

Good for sensitive skin - 09-06-2017 by

I have been using this product for about 3 weeks on and off (I get lazy sometimes) and notice my face always feels smoother the next day if I use it the night before. My skin is crazy sensitive and I have not had a problem with this product at all. I'm really loving this!

Love love love - 18-05-2017 by

This product I put on at night and it makes my skin feel so soft by morning. Amazing product amazing price!

Q & A
Enjoy FREE delivery for The Ordinary Lactic Acid 5% + HA 2% with same-day dispatch! Read reviews, buy now & pay later with Afterpay.